You mistake voting for declaring your ethics or something. You are confused. Voting has nothing to do with principles. It is solely a political act to influence an outcome one way or the other.
If you vote for anybody but the Republican this November (or if you fail to vote), you will have chosen to reelect the President. That would be a bad outcome.
Then you don’t read enough on the Founding Fathers. They would not have settled for the lesser of 2 evils.